Filter.



PATE'NTED AUG. 23, 1904. 0. SELG'Gz 0. GUNTRUM.

FILTER.

APPLICATION FILED NOV. 1a, 1903.

2 SHEETS-SHBET 1.

NO MODEL.

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No. 768,544. PATENTED AUG. 23, 1904. 0. SBLG a; 0. GUNTRUM.

FILTER.

APPLICATION FILED NOV.13, 1903.

2 SHEETS-SHEET 2- no monnn.

UNITED STATES Patented August 23, 1904. I

PATENT" OFFICE.

OTTO SELG AND CARL GUNTRUM, OF NEW YORK, N. Y., ASSIGNORS OF ONE-THIRDTO CHRISTIAN J AEGER AND LYN, NEW YORK.

J OSEF'SOHOETTL, OF BROOK- FILTER.

SPECIFICATION forming part of Letters Patent No. 768,544, dated August23, 1904. Application filed November 13, 1903, Serial No. 181,034. (Nomodel.)

-To all whom, it may concern: 7

Be it known that we, Orro SELG and CARL GUNTRUM, both citizens of theUnited States, and residents of New York city, (Brooklym) county ofKings, and State of New York,-have invented new. and useful Improvementsin Filters, of which the following is a specification.

This invention relates to a filter of great efficiency, which is not aptto become clogged andwhich may be readily and thoroughly cleaned.

In the accompanying drawings, Figure 1 is a front elevation of ourimproved liquid-filter; Fig. 2, a plan thereof; Fig. 3, a verticalsection on line 3 3, Fig. 2; Fig. 4, a horizontal section on line L 4:,Fig. 3, with the stirrer omitted; Fig. 5, a detail of part of thestirrer; Fig. 6, an elevation, partly in section, of the upper part ofthe filter, showing the auxiliary lid in position; Fig. 7 a plan of suchlid; and Fig. 8 a vertical section through the lower part of the filter,showing a modified construction of the outlet.

The letter (t represents a receiving-chamber for the liquid to befiltered, such chamber having inlet-nozzles a and being adapted to beclosed by an outer cover 5. The chamber a may be supported upon asuitable frame A by gudgeons 4 The cover I) is locked to chamber a byswinging bolts 1) and is provided with a nozzle 6 and a tapped centralopening 6 The chamber a incloses a tapering screen 0, which merges atits lower end into a frusto-conical imperforate shell cl. The

I screen 0 and shell 0Z collectively constitute a filtering-chamberhaving a perforated upper side or section, which is embraced by thereceiving-chamber a, and an imperforate lower side or section, thatdepends from such chamber. The filtering-chamber 0 d is filled with pulpor other filtering material 6.

The screen 0 is removably secured in position by means of an opentapering frame which is fitted concentrically within chamber a. Thisframe consists of an upper ring f, a lower ring f, and a series ofinclined ribs f that embrace screen 0.

Upon the frame is" adapted to be supported a perforated inner cover 9,which is placed at a distance from the outer cover 6, so that the liquidto be filtered can pass to the filtering-chamber through the screen 0 aswell as through the cover 9.

A gasket h is interposed between cover 9 and ring f, while a secondgasket h is interposed between ring fl and the bottom of chamber a.

The inner cover 9 is adapted to be pressed against its seat by a tubularplug 71, having a threaded lower end c", which engages the tappedopening 5 of cover Z). This plug may be rotated by a handle '17 andbears'upon a solid center piece 9 of coveng. A stufiingbox 7' is fittedto cover 6 and embraces plug c'.

The lower contracted end of shell d is provided with an outlet-nippleis, which also serves as a support for the filtering material 6. Uponthe upper end of this nipple is arranged a small outlet-chamber Z, whichtapers in a direction opposite to that of shell 0?. The chamber Z isprovided with a screen Z, secured to a series of inclined ribs Z Theseribs are attached at their upper end to a cap Z and at their lower endto a threaded ring 1*, which is tapped into nozzle 70.

The liquid to be filtered enters chamber a through opening a, and thencepasses through screen a and cover 9 to the filtering-chamber, where'itpercolates through the pulp. The filtrate is discharged through screen Zinto chamber Z and out through nipple 7c.

. To wash the filter, water is admitted from time to time through thenipple 7c and is forced through the filtering-chamber to be ejected intochamber a and thence outthrough nozzle 6 the inlet a being closed. Whilethe filter is being washed, it is desirable to stir the pulp e. To thiseffect there is mounted within the filtering-chamber a suitable numberof rods or stirrers m. These rods are arranged in sets and and areinclined in conformity with the taper of thefiltering-chamber. Each'setof rods m is connected 'to a-common radial arm n, which is mounted upona spindle 11, passing axially through the apparatus. The

arms n are inclined to a horizontal plane, so that when they are rotatedin the direction of the arrow, Fig. 5, they will tend to move the pulpdownward against the current of ascending water.

The spindle a is stepped upon cap Z and projects, with its upper end,through covers 9 7) and through the bore of plug 2'. A handle 72/permits the spindle to be rotated, while a stufiing-box d is fitted uponplug 11 to embrace the spindle. WVhile the rinsing-Water is forcedthrough the pulp in the manner described the handle 91 1's slowlyrotated, so that the stirrers will agitate the pulp and subject allparticles thereof to the action of the water.

In Fig. 6 is shown an auxiliary lid 0, which is adapted to be fittedupon the chamber a while the pulp is being filled into the filter.During this operation the covers 6 and g are removed and are replaced bythe lid 0. This lid is of annular form and has a central opening abovethe filtering-chamber. The lid excludes the pulp from chamber a duringthe charging of the chamber 0 (Z. An inner depending flange 0 on lid 0,bearing against screen 0, holds the lid in position. In order to supportthe spindle n, the central openin of lid 0 is spanned by a perforatedbridge 0*.

Fig. 8 shows a modification of the outlet for the filtrate. Here anannular foraminated bottom for the support of the pulp is fitted intothe lower end of shell d. A plug 9, tapped into nipple It is providedwith a chamber 11 below the screen and projects a distance above thescreen, Where it tapers in a direction opposite to the taper of shell d.The filtrate flows from shell (Z, through screen 1), into a pocket 0'',and thence through ports Q2, into chamber q, and out through nipple it.

It will be seen that with our improved filter the liquid enters thefiltering-chamber from its side as well as from the top. In this wayclogging is prevented, and the filter will remain operative for a longtime without requiring cleaning. While bcingcleaned, however, thestirrers will so agitate the pulp that the rinsing-water will washoutall impurities in a quick and eflicient manner.

What we claim is 1. A filter composed of a receiring-chamber, a screenand a perforated inner cover remorably fitted within said chamber, ashell bcneat h the screen, filtering material within the screen andshell, an outer cover, and a plug that passes through the outer coverand engages the inner cover, substantially as specified.

2. A filter composed of a receiving-chamber, a screen and a perforatedinner cover within said chamber, a shell beneath the screen, filter ingmaterial within the screen and shell, an outer cover, and a stirrerhaving a spindle that projects through the covers, substautiall asspecified.

3. Afiltercomposedofareceiving-chamher, an inclosed frame, a screensecured thereto, shell below the screen, an inner perforated coveradapted to engage the frame, an outer cover having a tapped opening, aninclosed tubular plug engaging the inner cover, av stirrer having aspindle embraced by the plug, and filtering material within the screenand shell, substantially as specified.

Signed by us at New York city, (Manhattan,) New York, this 12th day 01'.Noren'lber,

OT'JTO SELG. CARL G'UNIH U M Witnesses:

WILLIAM SCnULz, FRANK v. BRIESEN.

